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<FONT color="green">001</FONT>    package org.hackystat.telemetry.analyzer.language.parser;<a name="line.1"></a>
<FONT color="green">002</FONT>    <a name="line.2"></a>
<FONT color="green">003</FONT>    import java.util.regex.Matcher;<a name="line.3"></a>
<FONT color="green">004</FONT>    import java.util.regex.Pattern;<a name="line.4"></a>
<FONT color="green">005</FONT>    <a name="line.5"></a>
<FONT color="green">006</FONT>    import org.hackystat.telemetry.analyzer.language.TelemetryLanguageException;<a name="line.6"></a>
<FONT color="green">007</FONT>    import org.hackystat.telemetry.analyzer.language.parser.impl.ParseException;<a name="line.7"></a>
<FONT color="green">008</FONT>    import org.hackystat.telemetry.analyzer.language.parser.impl.Token;<a name="line.8"></a>
<FONT color="green">009</FONT>    import org.hackystat.telemetry.analyzer.language.parser.impl.TokenMgrError;<a name="line.9"></a>
<FONT color="green">010</FONT>    <a name="line.10"></a>
<FONT color="green">011</FONT>    /**<a name="line.11"></a>
<FONT color="green">012</FONT>     * Exception for telemetry query parsing related problems.<a name="line.12"></a>
<FONT color="green">013</FONT>     * <a name="line.13"></a>
<FONT color="green">014</FONT>     * @author (Cedric) Qin Zhang<a name="line.14"></a>
<FONT color="green">015</FONT>     * @version $Id$<a name="line.15"></a>
<FONT color="green">016</FONT>     */<a name="line.16"></a>
<FONT color="green">017</FONT>    public class ParsingException extends TelemetryLanguageException {<a name="line.17"></a>
<FONT color="green">018</FONT>    <a name="line.18"></a>
<FONT color="green">019</FONT>      private static final long serialVersionUID = 1L;<a name="line.19"></a>
<FONT color="green">020</FONT>      private int lineNumber = -1;<a name="line.20"></a>
<FONT color="green">021</FONT>      private int colNumber = -1;<a name="line.21"></a>
<FONT color="green">022</FONT>    <a name="line.22"></a>
<FONT color="green">023</FONT>      /** Pattern for TokenMgrError message. */<a name="line.23"></a>
<FONT color="green">024</FONT>      private static Pattern TOKEN_MGR_ERROR_MSG_PATTERN <a name="line.24"></a>
<FONT color="green">025</FONT>          = Pattern.compile("Lexical error at line \\d+, column \\d+. ");<a name="line.25"></a>
<FONT color="green">026</FONT>    <a name="line.26"></a>
<FONT color="green">027</FONT>      /** Pattern for one or more digits. */<a name="line.27"></a>
<FONT color="green">028</FONT>      private static Pattern DIGITS_PATTERN = Pattern.compile("\\d+");<a name="line.28"></a>
<FONT color="green">029</FONT>      <a name="line.29"></a>
<FONT color="green">030</FONT>      /**<a name="line.30"></a>
<FONT color="green">031</FONT>       * Constructs this parsing exception. Only use this constructor if you don't<a name="line.31"></a>
<FONT color="green">032</FONT>       * know where the parser encounters the error.<a name="line.32"></a>
<FONT color="green">033</FONT>       * <a name="line.33"></a>
<FONT color="green">034</FONT>       * @param message The error message.<a name="line.34"></a>
<FONT color="green">035</FONT>       */<a name="line.35"></a>
<FONT color="green">036</FONT>      public ParsingException(String message) {<a name="line.36"></a>
<FONT color="green">037</FONT>        super(message);<a name="line.37"></a>
<FONT color="green">038</FONT>      }<a name="line.38"></a>
<FONT color="green">039</FONT>    <a name="line.39"></a>
<FONT color="green">040</FONT>      /**<a name="line.40"></a>
<FONT color="green">041</FONT>       * Constructs this parsing exception.<a name="line.41"></a>
<FONT color="green">042</FONT>       * <a name="line.42"></a>
<FONT color="green">043</FONT>       * @param message The error message.<a name="line.43"></a>
<FONT color="green">044</FONT>       * @param errorLineNumber The line (1-indexed) where the parser encounters the error.<a name="line.44"></a>
<FONT color="green">045</FONT>       * @param errorColumnNumber The column (1-indexed) where the parser encounters the error.<a name="line.45"></a>
<FONT color="green">046</FONT>       */<a name="line.46"></a>
<FONT color="green">047</FONT>      public ParsingException(String message, int errorLineNumber, int errorColumnNumber) {<a name="line.47"></a>
<FONT color="green">048</FONT>        super(message);<a name="line.48"></a>
<FONT color="green">049</FONT>        this.lineNumber = errorLineNumber;<a name="line.49"></a>
<FONT color="green">050</FONT>        this.colNumber = errorColumnNumber;<a name="line.50"></a>
<FONT color="green">051</FONT>      }<a name="line.51"></a>
<FONT color="green">052</FONT>    <a name="line.52"></a>
<FONT color="green">053</FONT>      /**<a name="line.53"></a>
<FONT color="green">054</FONT>       * Constructs this parsing exception. &lt;p/&gt; &lt;b&gt;Important: &lt;/b&gt; If the exception<a name="line.54"></a>
<FONT color="green">055</FONT>       * passed in is of type &lt;code&gt;ParseException&lt;/code&gt;, then there is special<a name="line.55"></a>
<FONT color="green">056</FONT>       * logic to extract error line number and column number. This works with the<a name="line.56"></a>
<FONT color="green">057</FONT>       * ParseException code generated with JavaCC 3.1. I am not sure whether it<a name="line.57"></a>
<FONT color="green">058</FONT>       * will work correctly with other versions of JavaCC, since it uses some<a name="line.58"></a>
<FONT color="green">059</FONT>       * internal knowledge of the parser to get the line number and column number<a name="line.59"></a>
<FONT color="green">060</FONT>       * where the parse error occurs.<a name="line.60"></a>
<FONT color="green">061</FONT>       * <a name="line.61"></a>
<FONT color="green">062</FONT>       * @param exception The exception to be wrapped.<a name="line.62"></a>
<FONT color="green">063</FONT>       */<a name="line.63"></a>
<FONT color="green">064</FONT>      public ParsingException(Throwable exception) {<a name="line.64"></a>
<FONT color="green">065</FONT>        super(exception.getMessage());<a name="line.65"></a>
<FONT color="green">066</FONT>    <a name="line.66"></a>
<FONT color="green">067</FONT>        // JavaCC specific stuff, works with JavaCC 3.1 and 4.0, not sure about other versions.<a name="line.67"></a>
<FONT color="green">068</FONT>        if (exception instanceof ParseException) {<a name="line.68"></a>
<FONT color="green">069</FONT>          ParseException parseException = (ParseException) exception;<a name="line.69"></a>
<FONT color="green">070</FONT>          if (parseException.currentToken != null) {<a name="line.70"></a>
<FONT color="green">071</FONT>            try {<a name="line.71"></a>
<FONT color="green">072</FONT>              // I am not too sure about JavaCC internal implementation, so I put the following code<a name="line.72"></a>
<FONT color="green">073</FONT>              // in a try block, just in case I get some null pointer error.<a name="line.73"></a>
<FONT color="green">074</FONT>              Token nextToken = parseException.currentToken.next;<a name="line.74"></a>
<FONT color="green">075</FONT>              this.lineNumber = nextToken.beginLine;<a name="line.75"></a>
<FONT color="green">076</FONT>              this.colNumber = nextToken.beginColumn;<a name="line.76"></a>
<FONT color="green">077</FONT>            }<a name="line.77"></a>
<FONT color="green">078</FONT>            catch (Exception ex) {<a name="line.78"></a>
<FONT color="green">079</FONT>              this.lineNumber = -1;<a name="line.79"></a>
<FONT color="green">080</FONT>              this.colNumber = -1;<a name="line.80"></a>
<FONT color="green">081</FONT>            }<a name="line.81"></a>
<FONT color="green">082</FONT>          }<a name="line.82"></a>
<FONT color="green">083</FONT>        }<a name="line.83"></a>
<FONT color="green">084</FONT>        else if (exception instanceof TokenMgrError) {<a name="line.84"></a>
<FONT color="green">085</FONT>          int[] lineAndColumnNumber = this.parseTokenMgrErrorMessage((TokenMgrError) exception);<a name="line.85"></a>
<FONT color="green">086</FONT>          this.lineNumber = lineAndColumnNumber[0];<a name="line.86"></a>
<FONT color="green">087</FONT>          this.colNumber = lineAndColumnNumber[1];<a name="line.87"></a>
<FONT color="green">088</FONT>        }<a name="line.88"></a>
<FONT color="green">089</FONT>      }<a name="line.89"></a>
<FONT color="green">090</FONT>    <a name="line.90"></a>
<FONT color="green">091</FONT>      /**<a name="line.91"></a>
<FONT color="green">092</FONT>       * Parses the message in &lt;code&gt;TokenMgrError&lt;/code&gt; object, and try to<a name="line.92"></a>
<FONT color="green">093</FONT>       * extract line number and col number;<a name="line.93"></a>
<FONT color="green">094</FONT>       * <a name="line.94"></a>
<FONT color="green">095</FONT>       * @param tokenMgrError An instance of &lt;code&gt;TokenMgrError&lt;/code&gt;.<a name="line.95"></a>
<FONT color="green">096</FONT>       * <a name="line.96"></a>
<FONT color="green">097</FONT>       * @return An integer array of 2 elements, the first is line number, the<a name="line.97"></a>
<FONT color="green">098</FONT>       *         second is column number. Note that if there is any error extracting<a name="line.98"></a>
<FONT color="green">099</FONT>       *         the information, then the returned integer array is {-1, -1}.<a name="line.99"></a>
<FONT color="green">100</FONT>       */<a name="line.100"></a>
<FONT color="green">101</FONT>      private int[] parseTokenMgrErrorMessage(TokenMgrError tokenMgrError) {<a name="line.101"></a>
<FONT color="green">102</FONT>        // If you call TokenMgrError.getMessage(), it returns a string like:<a name="line.102"></a>
<FONT color="green">103</FONT>        // "Lexical error at line 2, column 53. Other stuff..."<a name="line.103"></a>
<FONT color="green">104</FONT>        // I am trying to extract line number and column number, this is the only way.<a name="line.104"></a>
<FONT color="green">105</FONT>        int[] lineAndColumnNumber = new int[] { -1, -1 };<a name="line.105"></a>
<FONT color="green">106</FONT>        try {<a name="line.106"></a>
<FONT color="green">107</FONT>          String tokenMgrErrorMsg = tokenMgrError.getMessage();<a name="line.107"></a>
<FONT color="green">108</FONT>          Matcher tokenMgrErrorMsgMatcher = TOKEN_MGR_ERROR_MSG_PATTERN.matcher(tokenMgrErrorMsg);<a name="line.108"></a>
<FONT color="green">109</FONT>          if (tokenMgrErrorMsgMatcher.find()) {<a name="line.109"></a>
<FONT color="green">110</FONT>            Matcher digitsMatcher = DIGITS_PATTERN.matcher(tokenMgrErrorMsgMatcher.group());<a name="line.110"></a>
<FONT color="green">111</FONT>            if (digitsMatcher.find()) {<a name="line.111"></a>
<FONT color="green">112</FONT>              String strLineNumber = digitsMatcher.group();<a name="line.112"></a>
<FONT color="green">113</FONT>              if (digitsMatcher.find()) {<a name="line.113"></a>
<FONT color="green">114</FONT>                String strColNumber = digitsMatcher.group();<a name="line.114"></a>
<FONT color="green">115</FONT>                lineAndColumnNumber[0] = Integer.parseInt(strLineNumber);<a name="line.115"></a>
<FONT color="green">116</FONT>                lineAndColumnNumber[1] = Integer.parseInt(strColNumber);<a name="line.116"></a>
<FONT color="green">117</FONT>              }<a name="line.117"></a>
<FONT color="green">118</FONT>            }<a name="line.118"></a>
<FONT color="green">119</FONT>          }<a name="line.119"></a>
<FONT color="green">120</FONT>        }<a name="line.120"></a>
<FONT color="green">121</FONT>        catch (Exception e) {<a name="line.121"></a>
<FONT color="green">122</FONT>          lineAndColumnNumber[0] = -1;<a name="line.122"></a>
<FONT color="green">123</FONT>          lineAndColumnNumber[1] = -1;<a name="line.123"></a>
<FONT color="green">124</FONT>        }<a name="line.124"></a>
<FONT color="green">125</FONT>        return lineAndColumnNumber;<a name="line.125"></a>
<FONT color="green">126</FONT>      }<a name="line.126"></a>
<FONT color="green">127</FONT>    <a name="line.127"></a>
<FONT color="green">128</FONT>      /**<a name="line.128"></a>
<FONT color="green">129</FONT>       * Gets the line number (1-indexed) where the parser encounters the error.<a name="line.129"></a>
<FONT color="green">130</FONT>       * <a name="line.130"></a>
<FONT color="green">131</FONT>       * @return The line number, or a non-positive number indication such information <a name="line.131"></a>
<FONT color="green">132</FONT>       *         is not available.<a name="line.132"></a>
<FONT color="green">133</FONT>       */<a name="line.133"></a>
<FONT color="green">134</FONT>      public int getErrorLineNumber() {<a name="line.134"></a>
<FONT color="green">135</FONT>        return this.lineNumber;<a name="line.135"></a>
<FONT color="green">136</FONT>      }<a name="line.136"></a>
<FONT color="green">137</FONT>    <a name="line.137"></a>
<FONT color="green">138</FONT>      /**<a name="line.138"></a>
<FONT color="green">139</FONT>       * Gets the column number (1-indexed) where the parser encounters the error.<a name="line.139"></a>
<FONT color="green">140</FONT>       * <a name="line.140"></a>
<FONT color="green">141</FONT>       * @return The column number, or a non-positive number indication such information <a name="line.141"></a>
<FONT color="green">142</FONT>       *         is not available.<a name="line.142"></a>
<FONT color="green">143</FONT>       */<a name="line.143"></a>
<FONT color="green">144</FONT>      public int getErrorColumnNumber() {<a name="line.144"></a>
<FONT color="green">145</FONT>        return this.colNumber;<a name="line.145"></a>
<FONT color="green">146</FONT>      }<a name="line.146"></a>
<FONT color="green">147</FONT>    }<a name="line.147"></a>




























































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